I thought many would find this interesting: https://vtx.vt.edu/articles/2022/12/ictas-equestrian-helmet-ratings.html
Virginia Tech did a study on equestrian helmets specifically and discusses the results. It’s promising that there is a history there of spurring some improvements.
Here is the shortcut to the ratings if you want to skip the article: https://helmet.beam.vt.edu/equestrian-helmet-ratings.html
I wish there were more. Found out a loved one’s helmet is at the bottom of the list and found the one at the top, but it wasn’t the one at the top after all… and the one I was looking at wasn’t on the list. Anyway. Keep on keepin’ on!